Friction clutch



DecQl9 1922. 1,439,314,

W. F. LAUTENSCHLAGER.

FRICTION CLUTCH. .F-ILED OCT-16.1919.

2 SHEETS-SHEET I.

7 1 v Have-14km Dec. 19, 1922. 1,439,314.

W. F. LAUTENSCHLAGER.

FRICTION CLUTCH.

FILED on. 16, 1919.

2 $HEETSSHEET 2- I Patented Dec. l9, i922.-

' Meant WILLIAM F. taurnivsonrnena or CINCINNATI, onto, Assrcnon TO LORENZ MUTHEE, or NEWTON, MASSACHUSETTS.

rarorron oLu'rcr-r.

Application filed October 16, 1919. Serial No. 331,080.

To all whom it may concern: v

. Be it known that I, VVILL'IAM FLAU'I'EN- SCI-ILAGER, a citizen ofthe United'States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Friction Clutches, of which the following specification is a full disclosure. I

My invention relates to a quick-acting friction clutch and braking mechanism for a single revolution or cycle shaft or transmi sion control, particularly adaptable for high speed machines operated intermittently and at great frequency.

An object of the invention is to provide a clutch which will automatically frictionally connect the driving member, to the driven member when the clutching device is released, and in which the clutching device is automatically and forcibly moved into its binding relationship-with the members to be connected and. in a directionwhereby its binding grip will be increased through any advancing rotation of one member over the other.

Another object of theinvention is to provide a simple, durable and quick-acting friction clutch easily controlled and comprising one or more rollers or cylindrical members i harshly eccentrically journaled between the driving and driven. elements to be connected, whereby through a slight oscillatory motion of the axisof said. rollers the parts may be connected or disconnected. g

Another object of the invention is to utilize the centrifugal and percussion force of a transmission member after it has been dis connected form its power drive for operating brake mechanism and imparting its own braking pressure, increasing withthe continuance of rotation for effectively and ,non-

stopping the rotation of said member. 1 v i Another object of the invention is to provide a driven transmission member, with means for controlling and actuatingclutching mechanism, whereby the power will be automatically cut off at a definite point or end of an operating cycle of the transmission member and through its own rotating motion, and through any centrifugal velocity thereof, or percussion force, impart, after the power has been cut, a variable braking force againstitself for-resisting rotation.

Further objects and advantages ;will. be

through the several views.

Figure 1 is a top plan view of my improved clutch and braking mechanism. a

Figure 2 is a section on line 22, Fig. 1. Figure 3 is a side elevation of. the clutch with parts shown in section.

Figure 4: is a section on line 4-45 Fig. 3. Figure 5 is a section on line 3. Figure 6 is an end elevation of the clutch and driving pulley with a portion of the pulley'brolren away to display parts which would otherwise be hidden thereby.

Referring to the drawings, 1 indicates the frame of the machine or bearinginwhich the shaft 2 is journaled. This shaft may represent the main driving shaftof the machine and is driven 'or'rotat'ed by a grooved belt pulley 3 when clutched together. The clutch and controlling mechanism therefor is particularly adapted for high speed power transmission and for single revolution shaft control, in whichfthe shaft may be brought positively and definitely to rest after a single revolution. bringing theimechanism operated by the shaft to a normal or. starting position. The pulley 3 normally is loosely mounted upon a hub-block l fixed upon the shaft 2 1 and is frictionally locked or clutched to the upon a cam or crank sh aft 6. within the hubblock extending parallel with the main shaft 2. The rollers are arranged within recesses 7 7f,respectively formedin the opposite sides of the hub-block. v The recesses are open to the periphery of the hub-block to permit the rollers to be moved beyond the periphery of the hub-block for frictional engagement under a wedge-like action with the bore surface of the pulley 3. When the cam shaft is rotated in an appropriate direction, the rollers are moved outwardly against the bore surface of the pulley, frictionally binding the pulley 3 to the hub-block i and shaft 2. The rollers are moved eccentrically in a direction forcing the rollers outwardly from the peripheryof the hub and rotatably in a: direction which will cause an additional der any free rotative infiuenceof the pulley 'binding force between the engaged parts uninc force for frictionally bindingthe parts togetliier. p

The canror eccentric shatt is rotated or swivelledl'iy a crank arm 7 fix d or l rictiom ally clamped upon the end 0, the shaft 6, the end of said sha't't projecting beyond the end face of the hub-block. The crankarm 7 is held under spring tension in one direction by a spring-8 having one end fixed to the crank arm and its opposite e d to a pin 9 secured in the side face of the hub-block 4. The springyieldingly forces and moves :the Q1'ankarm in a direction which will rock the can: shaft in a direction for forcing the roll ers into engagement with the inner bore surlace of the pulley for frictionally clutching the pulley'to, the shaft,thusproviding.a variablestroke for the eccentric shaft insuring sufiicient shaft throw to insure movement of the rollers into frictionally engagement with the pulley bore surface necessaryto cl? feet a binding grip between the parts engaged, and accommodate for any wear of the rollers or bore hub surface of thepulley.

The crank arm and its eccentric shaftare thus automatically operated as soon asthey are released or capable of being moved by @the tension of the spring 8. The clutch parts ...are disengaged bya cam member 1.0 loosely mounted upon the shaft 2 and slidablelon ludinally on said shaft for disengaging; we

crank arm jlroi-n said cam member. The cam member 10 has a peripheral can] sm'faceot a proper outline to more thee rank arm 7 in a direction which will rotate the ec- ,centric shaft to disengage the, rollers from .the-ir frictional bind or engagement with. the inner ,hore surface of thepulley moving the rollers inward within the periphery of tl e hub-block, permitting the vpulley to revolve freely upon the hub-block.

11 indicates the cam surface upon the periphery of the cam member 10 located at a point .zt'oima given limit of im tation of the shaftfZv At .theendof thecam surface the crank armengages with a hook-like projection 12, extending from the cam member for arresting' the rotation ofthe hub-block and its shaft- 2, bringing the shaft to a definite stoppingpoint, at the ,end of a revolution or 1 The crank arm '7 is provided with a crank pin 13-.,c,arr in roller 1 hwhich nornrrlly in esmrerthep hery f t i l we b ,10 and engages i lto the, hook notch o the hookension 12- of the canrmember at the endent a revolution,asisshown in Fig. To relieve the parts oi. undue shocksaud strains due ,to percussion when the crank ysion 12, I providea spring-tensioned plunig l a a bufiier engage iagain h -e e ".sion 12;:1nd sliclahl Withinhearing ugslT,

17, .iprqjecting from themainfram ,applied uponthe brake wheel 25. 'i he the cam member laterally upon the shaft 2 m vdiselrgage the clutch crank arm F from the shaft 2. against rotating; or swiyelhng n one d rection by a stop lug 27, prO ectmp; from the 28,;projecting from the main frame 1.

arm .7 engages against the stophookexten- 15 indicates a spring disposed between the 19. The opposite end of the brake lever 2 has a shoe or liner 2%, preferably of fibrous material. fixed thereon, bearing against the periphery of the brake wheel or rim extension 25, concentric with and liXQLl to the hubblock 4.

Thus when the stop extension 12 is moved rearwardly, it forces the plunger rear I wardly against the tension of the spring 10G swinging the brake actuating lever 18, which in turn exerts the force against the smriiig- 21, swinging the brake lever to apply a braking pressure against the brake wheel whereby the shaft is arrestedapgain t rotation through the tension of the s\ n and additionally through the brakin inc tension can be adjusted by regnda set screw 2?. which isnecessary for. d! rates oi shaft velocity.

The cam member 10 is provided \vi h n peripherally grooved collar 26 or shlltii cam member for clutching the pulley to the The cam member 10 hmrtcd collar 26. and engaging; against a stop pin a .1 rm

canimember is shifted by a shitting arm 29,

fixed to a rock shaft 30, journaled in the bearing extension 31' from the side liranu.

1. The opposite end of the rock shaft is provided with a crank arm .32 fixed to the rock shaft and piiotally connected to a treadle rod 33, which extends downwardly. e4 represents aispring interposed between the frame 1 and lug; extension 34L, projecting front the shi t ing arm 29 For yieldingrly forcing the shitting arm in a direction For normally maintaining the cam member 11) innalignrnent with the relief of the crank.

shaft arm 29 has a pin 35 puojecfing laterally therefrom and engaging into the ;roove 36 in the shifting collar 96, whereby tllGShll'tlIlg collar and its cam member 11) connect with the shifting arm for moving" the cam member upon the shaft 2 to disengage the crank arm fromvthe cammember.

The free end of theshitting arm 29 is ,Pmvide wi a \r e 37 en a ing a a extension 3'8'fixed to the brake lever 23, for

actuating the brake lever to release the brake 'With the clutch control as long as the'shilt ing arm 29 is engaged with the brake arm extension 38. This relievesthe shaft of the braking pressure in a starting period of rotation. The brake 1S also released from the brake Wheel as long as the shifting arm remains in its operated position for continuous rotation of the shaft 2.

Having described my invention, I claim:

1. In a device of the class described, a

, driven member, a driving member normally loosely journaled upon said driven member, means for operatively connecting and disconnecting said members, said means com-. prising a shaft eccentrically mounted on said driven member,'a roller eccentrically and loosely mounted upon said shaft, engageable With said driving member, to couple said members for. rotation in unison, a crank arm upon said eccentric shaft to rotate the same in its Ways to disconnect said driving member and means foroperating said crank predeterminedly in relationto' the unitary rotation of said driving and driven members.

2. In a device of the class described, driving and driven members, an eccentric'roller clutch for connecting and disconnecting said members, a clutch controlling a crank n1ember, a sliding and non-rotatable cam member cooperating with said crank member for single rotation control of said driven and driving. members and means for operating said sliding and non-rotatable cam member.

3. In a device of the class described, driving and driven members, an eccentric roller clutch for connecting and disconnecting said members, a clutch controlling crank, a slidmg cam member cooperatmg with said crank for disconnecting said driving member,

said driven member, operated by said buffer for imparting a braking pressure against said drivenmember, the momentum ofsaid driven member supplying the force for operating said brake.

5. In a device of the class described, driving and driven members, a clutch for connecting and disconnecting said members having a clutch controlling crank rotating With said driven member, a cam member cooperating With said crank for releasing said clutch and arresting the rotation of said driven member, a spring tension buffer engaged With said crank, and a brake engaging said driven member, operated by said buffer for imparting a braking pressure agianst said driven'member, and an adjustable yielding coupling connecting said buffer and brake the momentum. of said driven member supplying the force for operating said brake.

In Witness whereof, I hereunto subscribe my name, as attested by the tWo subscribing Witnesses.

WILLIAM F. LAUTENSU'ILAGER.

Witnesses:

L. A. BECK. M. SBARRON. 

